Sony MDX-C7900, Service Manual

Page: 26 / 62

MDX-C7900/C7900R
– 35 – – 36 – – 37 – – 38 –
5-7. SCHEMATIC DIAGRAM – MAIN Section – •
See page 3 for Type A/Type B Discrimination.
•
See page 42 for IC Block Diagrams and page 45 for Waveforms.
Note on Schematic Diagram:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and 1 /
4
W or less unless otherwise
specified.
•
f
: internal component.
• C : panel designation.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
) : AM
〈〈 〉〉
: LW
< > : MD
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM
E
: MD
L
: BUS AUDIO IN
• Abbreviation
CND : Canadian
G
: German